| 摘要 |
An elevator rod is passed through a hollow post. A lower cymbal is mounted on the upper end of the post, while an upper cymbal is mounted on the upper portion of the rod. The elevator rod is urged upward by a return spring. A running pulley is mounted on the lower end portion of the rod. The running pulley is rotatable around a horizontal support shaft. A foot board is disposed at a position lower than the pulley, and a flexible member is wound around the pulley. A fixed end of the flexible member is connected to a supporting portion which is situated lower than the running pulley. A free end of the flexible member is connected to the extreme end portion of the foot board.
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